I get a cough that doesn't go away, and when I breathe out - I cough more at the end of it. Dh suffers from asthma and he needs a preventative - he got me some Ventolin that I use sometimes when I can't stop.

Usually I blow out like I'm blowing out candles and get out all the air that I can and do that until it goes away. Works for me really well - dh discovered that trick when doing an assessment on asthma (he's in his 2nd year of nursing degree)